Warp stop-motion for looms.



PATENTBD AUG. 30, 1904.

J. GHAINE. I WARP STOP MOTION FOR LOOMS.

APPLIUATIOH FILED SEPT. 4,1903.

N0 MODEL.

FIG.6 H66 7 WITN 516656 ATTORNEI v5 UNITED STATES Patented August 30, 190

PATENT EErcE.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 768,651, dated August 30, 1904,

Application filed september 4, 1903. Serial No. 171,984.

To all whom, it may concern.-

Be it known that I, JOSEPH CHAINE, a citizen of France, residing at 24 Rue Gourdon, Vierzon, Cher, France, have invented a new and useful arp Stop-Motion for Looms, of which the following is a specification.

The warp stop-motion for looms forming the subject of the present invention is of the class of those in which the breakage of a warpthread causes the closing of an electric circuit which acts through the intervention of an electromagnet on the stop-motion of the loom. It is distinguished from known arrangements by the fact that all the parts of which it is composed are located in the interior of the heddle-carrying frame, of which they form an integral part, and that the movement which establishes electric contact in the event of breakage of a warp-thread is produced by the heddles themselves when they are raised by the tension of the warp-threads during the descent of the heddle-carrying frame.

The accompanying drawings represent a practical arrangement for carrying the invention into effect. I

Figure 1 is a front view of a heddle-carrying frame at the moment when it reaches the top of its motion. Fig. 2 is a horizontal section drawn on the lineA B of Fig. 1. Fig. 3 is a vertical cross-section of Fig. 1. Fig. 4 is a vertical cross-section of the heddle-carrying frame during its descending motion. Figs. 5 and 6 are vertical transverse sections of the lower part of the heddle-carrying frame, showing a modification The heddle-carrying frame is composed of two metallic uprights a a, connecting two horizontal wooden cross-bars I) Z). The heddles Z are metallic and of any known construction.

They are supported by two metallic rods d and e, passing through their lower and upper loops, within which they have a certain play which permits a small vertical motion of the heddles in-relation to the frame. The upper rod,d, is fixed to the frame. The lower rod,e,is, on the contrary, movable in slots formed in the uprights a a and can be raised a small distance by the heddles. It is useful to provide the upper loop of the heddles witha tailpiece w (No model.)

of the uprights a, While the other, 9, is insulated from the frame and connected to metallic'rod h, fixed on the lower cross-bar 6. During the rising motion of the frame (see Figs. 1 and 3) the tension of the warp-threads 0 retains all the heddles lowered, and the rod 6 remains at the bottom of its motion. On the contrary, during the descent of the frame (see Fig. 4) the heddles Z are raised by the tension of the warp-threads 0, and the rod 0 is also raised. At this moment if one or more warp-threads are broken the corresponding heddles remain down, as indicated by dots showing the end of a heddle-loop Z in Figs. i and 6, and by means of the arrangement about to be described or by any analogous arrangement close the electric circuit between the rod it and the metallic part of the'frame. For this purpose below the lower rod, 6, and carried by this rod are stretched two parallel metallic wires 0 0, hooked by means of rods 2 7 to insulating-supports 7c, carried by the rod 0. The rods 7' carry springs m, which insure the tension of the wires. The rods are terminated by a loop a, traversed Without contact by the metallic rod it. When at rest, (see Figs. 1 and 3,) the wires 0 are separated from each other to a greater width than the width of the loops of the heddles Z; but when the rod 6 is raised (see Fig. 4) these wires are drawn together by two or more staples p, having approaching inclines which cause them to approach each other and bring them into contact With the loops which, like Z, have notfollowed the movement of the rod. The staples p, which also serve as guides for the rod 6, are insulated from the wires 0 by small insulating-tubes r r. It results from these arrangements that when in the descent of the frame, (see Fig. the heddles and the rod 1/; being raised by the tension of the warpthreads, the wires 0 0 are raised and caused to approach each other at the same time that by the loop 1/ they comeintocommunication with the rod la, which constitutes one of the poles of the current. At this moment if all the warp-tlueads are intact all the heddles I will be raised above the wires 0 and no current will be established; but if a warp-thread has been broken the corresponding heddle, with its loop I, will be encountered by the wires 0, and the current will be established from the spring r to the spring 9 by the rod it, the wires 0, the empty and fallen heddle-loop l, and the metallic part of the frame. This current, as already stated, traverses a-n electromagnet, which acts on any known mechanism to stop the loom. When the loom is arranged to stop automatically for other causes, it will be useful to cause the eletromagnet of the warpstop mechanism to act on a visible signal indicating the cause of the stoppage.

As will be seen, the invention consists in utilizing the rising motion of the rod 6 to bring the metallic wires 0 into communication,

on the one hand, with the contact h and, on the other, with the heddles, which have lost their warp-threads; but this result might be obtained by different means. A single wire instead of two might even be employed, as

shown at Figs. 5 and 6, the position of which corresponds, respectively, with that of Figs. 3 and at. The single conducting-wire 0 is carried at each side of the frame by a crank-lever .9, one arm of which is attached to therod Z 0. hen this latter rises, the wire 0, by

moving in a parallel direction below the heddles, encounters the vertical contact-bar 71,, forming one pole of the current, and eventually such of the heddle-loops Z which have i been abandoned by their warp-threads. The

rest of the working is as above described.

Having fully described my invention, what 1 claim, and desire to secure by Letters Patent, is-

1. An electric warp stop-motion for looms, the combination with a frame carrying the heddles, one or more conducting-wires in said frame below the heddles and a contact-piece also carried by the frame and forming one pole of the current contacting with said wires on the descent of the frame, the heddles which are not supported by their warp-threads also contacting with said wires and forming the other pole of the current, substantially as described.

2. In an electric warp stop-motion for looms, the combination of a frame, an upper bar fixed in said frame, a lower bar movably secured in said frame, metallic heddles secured to said bars, the lower bar being raised by the heddles during the descent of the frame, and conductingwires secured to said lower bar, and means on the frame contacting with the conducting-wires when the bar is raised to close the circuit.

3. In an electric warp stop-motion, in combination with a frame, a fixed upper bar and a movable lower bar carried by said frame, metallic heddles secured on said bars, conducting-wires carried by said movable bar, a contact-piece secured to said frame and contacting with the conducting-wires on the descent of the frame, and springs for drawing the frame downwardly, one of said springs being in electrical communication with the heddles through the metallic part of the frame and the other being in electrical communication with the contact-piece.

4. In an electric warp stop-motion for looms, the combination of a heddle-carrying frame consisting of metal uprights and wooden crossbars, cords for raising said frame, springs to draw it downwardly, ametal upper cross-bar (Z fixed in the frame, a metallic lower crossbar a movable in slots formed in the frame, metallic heddles having loops at their ends encircling said metallic bars, said loops being longer than the section. of the bars, the heddles and lower cross-bars being raised in relation to the frame by the warp-threads in the descent of the heddleframe, conducting-wires carried by the frame below the lower crossbar a, a contact connected with one of the springs, metallic connections from the other spring to one of the uprights and means for bringing the conductingwire into contact with the heddles which are not supported by their warp-threads so as to complete the electrical circuit, substantially as described.

In witness whereof -I have hereunto set my hand in presence of two witnesses.

JOSEPH GHAINE.

\Vitnesses:

(Jr. TOTEERON, J r., L. D. RAGNIER. 

